Improvement in water-heaters for fire-engines



A. H. PERRY.

Improvement in Water-Heaters for Fire-Engines.,

'Patented om. 22,1872.

WITNESSES.

QW@ @Mdm ED STATES PATENT EEIoE.

ALFRED H. PERRY, AOF BOSTON, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO DAVID SHARP, OF SOUTH BOSTON, MASSACHUSETTS.

IMPROVEMENT IN WATER-HEATERS FOR FIRE-ENGINES.

Specication forming part of Letters Patent No. 132,488, dated October 22, 187:2.

To all whom t may concern:

Be it known that l, ALFRED H. PERRY, of Boston, in the county of Suffolk and Stateof Massachusetts, have invented a new and valuable Improvement in Fire-Engine Heaters; and I do hereby declare that the following' is afull, clear, and exact description of the construction and operation ofthe same, reference being' had to the annexed drawing making' a part of this specification, and to the letters and figures of reference marked thereon.

The iigure of the drawing is a representation of a sectional view of my invention.

This invention has relation to steam lireengines; and consists in the construction and novel arrangement oi a heater designed to be used in connection with a gasjet or other slight dame for the purpose of heating the water in the boiler ',vhile the engine is inits house. The object of this invention is to facilitate the getting up of steam by keeping the water in the boiler always `at a temperature which may be easily raised to the boilingpoint when the tire is kindled.

Referring to the accompanying drawing, A

' a designate a double-walled cylinder, having an open bottom and provided with a spiral coil of pipe, B, located within the compass oi" the inner wall a, and communicating at the top and bottom with the space A/ between the two walls, and the double top ofthe cylinder. A pipe, C, extends from the top of the cylinder or heater upward, and is connected to the steam boiler, producing communication between the latter and the. spaceA. Another pipe, D, forms a means of communication between the lower part of the space A and the steam boiler, at a point below the heater. When the boiler is filled with water the heater and its connecting-tubes are also lled. A iet of gas or a flame from a lamp is now brought to bear on the coil B. The water therein and in the space A very soon becomes heated and begins to circulate, rising through the pipe C into the boiler, while its place is occupied by water rising through the pipe D. This circulation continues so long as the flame gives heat to the coil and interior ofthe heater, and thus keeps the water in the boiler at a degree of temperature from which it will rise to the boiling-poi nt in two or three minutes after the torch is applied to the lire.

The heater need not be apermanent attachment to the boiler, but may be connected to and disconnected from it at will.

The improved water-heater for steam reengines herein described, consisting of the double cylinders or casin gs A a, the inner cylinder a provided with a coil of pipe and surrounded by the outer cylinder, and thereby producing an annular water-space, A', and the outer cylinder connected above and below to the steam-boiler by means of the pipes C D, all constructed and arranged as shown and described. Y

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.'

ALFRED H. PERRY.

Witnesses:

WALLIS D. PACKARD, FRANcrs S. DYER. 

